Mercurial > hg
annotate tests/test-atomictempfile.py @ 40919:a0886a4d6dce
tests: remove all transitional configuration
Now that sparse-revlog is enabled by default, we no longer needs it.
Differential Revision: https://phab.mercurial-scm.org/D5346
author | Boris Feld <boris.feld@octobus.net> |
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date | Mon, 12 Nov 2018 02:21:52 +0100 |
parents | ffa3026d4196 |
children | 2372284d9457 |
rev | line source |
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1 from __future__ import absolute_import |
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2 |
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3 import glob |
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4 import os |
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5 import shutil |
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6 import stat |
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7 import tempfile |
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8 import unittest |
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9 |
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10 from mercurial import ( |
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11 pycompat, |
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12 util, |
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13 ) |
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14 atomictempfile = util.atomictempfile |
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15 |
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16 if pycompat.ispy3: |
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17 xrange = range |
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18 |
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19 class testatomictempfile(unittest.TestCase): |
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20 def setUp(self): |
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21 self._testdir = tempfile.mkdtemp(b'atomictempfiletest') |
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22 self._filename = os.path.join(self._testdir, b'testfilename') |
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23 |
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24 def tearDown(self): |
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25 shutil.rmtree(self._testdir, True) |
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26 |
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27 def testsimple(self): |
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28 file = atomictempfile(self._filename) |
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29 self.assertFalse(os.path.isfile(self._filename)) |
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30 tempfilename = file._tempname |
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31 self.assertTrue(tempfilename in glob.glob( |
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32 os.path.join(self._testdir, b'.testfilename-*'))) |
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33 |
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34 file.write(b'argh\n') |
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35 file.close() |
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36 |
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37 self.assertTrue(os.path.isfile(self._filename)) |
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38 self.assertTrue(tempfilename not in glob.glob( |
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39 os.path.join(self._testdir, b'.testfilename-*'))) |
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40 |
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41 # discard() removes the temp file without making the write permanent |
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42 def testdiscard(self): |
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43 file = atomictempfile(self._filename) |
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44 (dir, basename) = os.path.split(file._tempname) |
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45 |
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46 file.write(b'yo\n') |
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47 file.discard() |
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48 |
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49 self.assertFalse(os.path.isfile(self._filename)) |
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50 self.assertTrue(basename not in os.listdir(b'.')) |
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51 |
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52 # if a programmer screws up and passes bad args to atomictempfile, they |
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53 # get a plain ordinary TypeError, not infinite recursion |
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54 def testoops(self): |
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55 with self.assertRaises(TypeError): |
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56 atomictempfile() |
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57 |
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58 # checkambig=True avoids ambiguity of timestamp |
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59 def testcheckambig(self): |
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60 def atomicwrite(checkambig): |
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61 f = atomictempfile(self._filename, checkambig=checkambig) |
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62 f.write(b'FOO') |
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63 f.close() |
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64 |
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65 # try some times, because reproduction of ambiguity depends on |
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66 # "filesystem time" |
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67 for i in xrange(5): |
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68 atomicwrite(False) |
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69 oldstat = os.stat(self._filename) |
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70 if oldstat[stat.ST_CTIME] != oldstat[stat.ST_MTIME]: |
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71 # subsequent changing never causes ambiguity |
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72 continue |
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73 |
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74 repetition = 3 |
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75 |
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76 # repeat atomic write with checkambig=True, to examine |
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77 # whether st_mtime is advanced multiple times as expected |
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78 for j in xrange(repetition): |
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79 atomicwrite(True) |
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80 newstat = os.stat(self._filename) |
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81 if oldstat[stat.ST_CTIME] != newstat[stat.ST_CTIME]: |
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82 # timestamp ambiguity was naturally avoided while repetition |
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83 continue |
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84 |
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85 # st_mtime should be advanced "repetition" times, because |
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86 # all atomicwrite() occurred at same time (in sec) |
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87 oldtime = (oldstat[stat.ST_MTIME] + repetition) & 0x7fffffff |
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88 self.assertTrue(newstat[stat.ST_MTIME] == oldtime) |
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89 # no more examination is needed, if assumption above is true |
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90 break |
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91 else: |
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92 # This platform seems too slow to examine anti-ambiguity |
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93 # of file timestamp (or test happened to be executed at |
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94 # bad timing). Exit silently in this case, because running |
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95 # on other faster platforms can detect problems |
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96 pass |
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97 |
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98 def testread(self): |
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99 with open(self._filename, 'wb') as f: |
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100 f.write(b'foobar\n') |
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101 file = atomictempfile(self._filename, mode=b'rb') |
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102 self.assertTrue(file.read(), b'foobar\n') |
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103 file.discard() |
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104 |
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105 def testcontextmanagersuccess(self): |
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106 """When the context closes, the file is closed""" |
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107 with atomictempfile(b'foo') as f: |
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108 self.assertFalse(os.path.isfile(b'foo')) |
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109 f.write(b'argh\n') |
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110 self.assertTrue(os.path.isfile(b'foo')) |
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111 |
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112 def testcontextmanagerfailure(self): |
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113 """On exception, the file is discarded""" |
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114 try: |
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115 with atomictempfile(b'foo') as f: |
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116 self.assertFalse(os.path.isfile(b'foo')) |
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117 f.write(b'argh\n') |
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118 raise ValueError |
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119 except ValueError: |
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120 pass |
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121 self.assertFalse(os.path.isfile(b'foo')) |
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122 |
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123 if __name__ == '__main__': |
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124 import silenttestrunner |
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125 silenttestrunner.main(__name__) |